Device for separating concrete pole and the like from mold frame

ABSTRACT

This invention relates to improvement on a device for separating a concrete pole and the like from a mold frame and respective parts of said device, which comprise providing an extruding device having an oil pressure jack at one end of the mold frame and a pulling-out device having a clamp trolley at the other end of said mold frame as a device for separating a concrete product such as a concrete pole or the like which has been subjected to centrifugal clamping and steam curing in the mold frame having a cut-into-two type circular section, after clamp bolts at one side of aforesaid mold frame have been released, extruding the content at a predetermined dimension by the aforesaid extruding device, and then clamping to pull out the content by said pulling-out device thereby to place the content on a roller.

United States Patent [191 Okada et al.

[111 3,829,273 [451 Aug. 13, 1974 DEVICE FOR SEPARATING CONCRETE POLEAND THE LIKE FROM MOLD FRAME [73] Assignee:

[22] Filed: June 30, 1972 [2]] Appl. N0.: 268,196

[52] US. Cl 425/444, 164/408, 249/66, 425/436 [51] Int. Cl B28b 21/90[58] Field of Search 425/436, 444; 164/408; 249/66-68 [56] ReferencesCited UNITED STATES PATENTS 800,712 10/1905 Blount 164/408 1,821,1289/1931 Weir 425/436 3,522,838 8/1970 Ott 425/436 FOREIGN PATENTS ORAPPLICATIONS 1,173,941 12/1969 Great Britain 164/408 A 12 g ll 1., l l,

1] IR 11 l Nippon Concrete Industries Co., Ltd., Tokyo, Japan PrimaryExaminer-R. Spencer Annear Attorney, Agent, or FirmOblon, Fisher,Spivak, McClelland & Maier 5 7] ABSTRACT This invention relates toimprovement on a device for separating a concrete pole and the like froma mold frame and respective parts of said device, which compriseproviding an extruding device having an oil pressure jack at one end ofthe mold frame and a pullingout device having a clamp trolley at theother end of 3 Claims, 9 Drawing Figures PAIENIEB mm 3:914

SHEET 1 0F 4 FIG.I

FIG.2

Pmmanwm 3329.273

SHEET 3 [1F 4 FIG.6

memo-m1 3 m4 SHEETQUF I FIG.8

DEVICE FOR SEPARATING CONCRETE'POLE AND THE LIKE FROM MOLD FRAME SUMMARYOF THE INVENTION This invention relates to a device for separatingconcrete poles, concrete piles and the like concrete products from themold frame after molding.

In the manufacture of concrete poles and the like, heretofore there havebeen carried out such operations, by use of a mold frame assembly of acut-into-two circular section, comprising the steps of firstly applyingor spreading a mold releasing agent on the inner peripheral surfaces ofboth upper and lower mold frames, which contact the concrete, theninstalling a required reinforced cage in the lower mold frame,thereafter filling a required amount of the concrete in said cage,covering the upper mold frame on the lower frame, and clamping with boltthe flange parts of said mold frames to form an integral body, clampingthe concrete by a centrifugal method, a vibration method or the like,hardening the concrete by steam curing thereby to complete molding, andreleasing the product from the mold frame.

In the conventional method, however, in order to release the productfrom the mold frame, bolts of the flange are all removed and the uppermold frame is removed by a crane operation, then the product concretepole is taken out by ball hanging of wire. Thereafter, since operationsare repeated, aforesaid clamping of clamp bolts and releasing thereofrequire many skilled workhands and, in addition, labor therefor isheavy, the operational efficiency is inferior and it is not adapted forthe flow process, and further the operation involves dangers.

The present invention relates to a device for releasing the productssuch as concrete poles and the like from the mold frame. A first objectof the present invention resides in that a gap is produced between theconcrete product and the upper mold frame by merely releasing clampbolts at one side without removing all the clamp bolts for the moldframe, and thereafter a concrete pole or the like is extruded at its oneend and pulled out at another end, and thus released from the moldframe, whereby the operations can be automatically carried out by use ofa motive power, a troublesome clamp bolt removing operation isunnecessary, and hence the operation is simplified thereby to improvethe operational efficiency.

A second object of the present invention resides in that the productsuch as concrete pole or the like which has been partly extruded fromthe mold frame by means of an oil pressure jack is clamped, the toggleeffect of clamp click is utilized upon causing a clamp trolley to travelthereby to make the clamp operation accurate, the concrete product ispulled out on the roller with the use of clamp trolley, wherebymold-releasing can be carried out only by the operation on a plane anduse of crane is not necessary, thus the safety and the efficiency of theoperation being promoted.

Other objects and features of the present invention will be moreapparent from a few following examples embodying the present inventionas described in conjuction with drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings show a fewexamples embodying the present invention, in which;

FIG. 1 is a front elevation showing the outline of the entire deviceaccording to the invention;

FIG. 2 is a side elevation showing the detail of an extruding device;

FIG. 3 is a frontelevation partly showing the same;

FIG. 4 is a side elevation showing the essential part of the same;

FIG. 5 is a side elevation showing the detail of a pulling-out device;

FIG. 6 is a front elevation partly showing the same;

FIG. 7 is a plane view partly showing the same;

FIG. 8 is a plane view showing the other example of the pulling-outdevice, partly omitted; and

FIG. 9 is a front elevation partly showing the same.

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows the outline of theentire device according to the present invention, in which referencenumeral 11 designates a concrete pole placed on a V block 13 for moldreleasing after it has been subjected to centrifugal clamping and steamcuring within the mold frame 12 having a cut-into-two type circularsection. After a number of clamping bolts on one side at the flange partof said mold frame 12 have been released, the tip end of the concretepole ll fitted within the mold frame 12 is extruded about 50cm by meansof an extruding device A having an oil pressure jack as will bedescribed hereinbelow, and, on the other hand, the bottom end of theconcrete pole 11 is clamped and pulled out by means of a pulling-outdevice B having a clamp trolley as will be mentioned below, and theconcrete pole is placed on a position-fixed roller 14 as shown byimaginary line.

FIGS. 2, 3 and 4 respectively show the detail of the extruding device,in which reference numeral 15 designates an oil jack mounted on atrolley 16 in a freely vertically movable manner as will be mentionedbelow, and three clicks 20 are attached to said jack through a cam 18fitted with an operating handle 17a and a cam sleeve 19. That is, asupporting frame 21 is fixed to the trolley 16 and an accepting base 24for a screw rod 23 which ascends and descends by the operation of ahandle 22 is mounted on said supporting frame 21. At the upper end ofsaid screw rod 23 there is fixed a holding ring 25 outwardly fitting andsupporting the oil pressure jack 15. The click 20 screwed with a bolt 26at its base end comes into contact with the surface of the cam 18, andis pressed at all times in the opening direction by means of a spring27. The click 20 is axially supported by a connecting ring 28 attachedwith a handle 17b in the front of the cam sleeve 19 and connectedintegrally to said connecting ring. Reference numeral 29 designates anoil pressure hose joint.

The extruding device having the aforementioned construction is arrangedat the tip end of the concrete pole 11 which has been molded in thepreceding step as illustrated in FIG. 1, and the handle 17a is broughtfrom the state shown by one-dot chain line to the state shown by solidline, and, as shown in FIG. 3, the flange 12a of the mold frame 12 isengaged with the extruding device by means of the click 20, then the oilpressure jack 15 is operated and the tip end of the concrete pole 11 ispressed by a rod 15a thereby to protrude the bottom end of the concretepole 11 out of the bottom end side of the mold frame 12.

As has been mentioned above, in the extruding device according to thepresent invention, the oil pressure jack 15 and the like are mounted ona freely traveling trolley 16 in a freely vertically adjustable manner,a plurality of clicks 20-engaged with the concrete pole mold frame 12are attached to said oil pressure jack 15 thereby to fix the concretepole mold frame 12, the concrete pole 11 is pushed in the direction ofthe bottom end of the mold frame 12 by the oil pressure jack thereby tocarry out preparations for the pulling out in the succeeding step.Hence, it does not require the crane for mold releasing operation, andit is sufficient if only bolts of the mold frame on one side arereleased, as a result of which the operation becomes simple and safe andits effect in practical use is remarkable.

FIGS. 5, 6 and 7 respectively show one example of a pulling-out device.The concrete pole 11 extruded about 50cm-from the mold frame 12 is heldat its bot tom end 11a by a clamp click 32 attached to a clamp trolley31 constituting the pulling-out device B. The

clamp trolley 31 travels in the direction shown by arrow by a wiredriven by a motor (not shown) while being guided by monorail type guiderails 33 and 33',-

but, upon this occasion, the concrete pole bottom end 11a is heldfurther stronger by the toggle effect. More specifically, theintermediate part of the clamp click 32 is pinned to an arm 31a on theclamp trolley 31, and further the clamp trolley 31 and the clamp click32 are connected to each other at two points through oblique links 31band 31c, and hence the forward end of the clamp click 32 tends to closewith respect to the travel of the'clamp trolley in the direction shownby arrow.

Thus, the concrete pole 11 is pulled up to a predetermined position onthe roller 14.

A limit switch (not shown) acts to operate a lifting jack 34 fortransference at a predetermined position during the travel of the clamptrolley 31, and the V block 13 at the forward end is caused to descend.By the descent of said V block 13 the lower surface of the concrete pole11 is made horizontal surface, and hence it is placed on the rollerdisposed on a horizontal surface without any trouble and smoothly.

Reference numeral 35 designates a handle for vertically adjusting theclamp click 32 in correspondence to the height of the concrete pole 11,said handle being attached to the clamp trolley 31.

On the other hand, the mold frame 11 which has been emptied causes thelifting jack 34 for transferrence to operate, and inclines the V block13 to roll itto a transfer base 36.

FIGS. 8 and 9 show the second example embodying the pulling-out deviceaccording to the present invention. A clamp trolley 42 is fitted to anendless chain 37, and the endless chain 37 is driven by a brake motor 38thereby to shift the clamp trolley 42 to a position shown by solid lineon a parallel rail 41. At this position the bottom end 11a of theconcrete pole 11 is held by clamp click 39 axially supported in a freelyoscillating manner, and when the clamp trolley 42 is returned to aposition shown by one-dot chain line, the concrete pole 11 is pulled outof the mold frame. The concrete pole 11, during its pulling-out step,abuts against a limit switch (not shown), and the product supportingjack 40 at the tip end part is lifted and the concrete pole is supportedby the horizontal surface at its lower surface. When the concrete pole11 has been transferred to a predetermined position (by the clamptrolley 42 to a position shown by one-dot chain line), the clamp click39 is hoisted by a crane (not shown) to be shifted to the succeedingstep and the product supporting jack 40 is caused to descend, andrestored to the original position.

As has been mentioned above, the pulling-out device according to thepresent invention can perform the mold releasing operation safely by anextremely simple step, and the operation can be carried out rapidly andautomatically.

Furthermore, the present invention is not limited to the aforementionedexamples, but for instance, the chuck at the bottom end of the concretepole can be replaced by that of an oil pressure method or the like, andguiding method can be replaced by other method.

We claim: 1. Apparatus for separating a concrete pole from a mold framecomprising:

vertically adjustable horizontally disposed means for supporting saidmold frame and said concrete pole;

means disposed at one end of said mold frame for extruding said concretepole from said mold frame a predetermined distance;

a plurality of fixed roller support means for facilitating thelongitudinal movement of said concrete pole when said concrete pole isseparated from said mold frame;

horizontally movable means disposed at the other end of said moldincluding means for externally gripping said extruded pole andextracting said pole from said mold onto said fixed roller supportmeans; and

means for vertically adjusting said vertically adjustable means forvertically aligning said vertically adjustable means with said rollermeans whereby said extracted pole may be placed upon said fixed rollersupport means.

2. Apparatus for separating a concrete pole from a mold frame includingan extracting device comprising:

a hydraulic jack having movable ram means for engaging and extrudingsaid pole from said mold frame a predetermined distance;

a plurality of gripper means disposed about said jack for gripping aflanged portion of said mold frame;

spring means respectively associated with each of said gripper means forbiasing said gripper means to an open position whereby said grippermeans may be disposed about said flanged portion of said mold frame; androtatable cam means disposed about said jack for biasing said grippermeans to a closed position whereupon said gripper means may grip saidflanged portion of said mold frame. 3. Apparatus for separating aconcrete pole from a mold frame including an extracting devicecomprising:

a trolley movable upon guide rail means;

and said trolley whereupon said clamping means are biased toward aclosed, clamping position when said motor driven cable means moves saidtrolley in a direction so as to extract said pole from said mold frame.

1. Apparatus for separating a concrete pole from a mold framecomprising: vertically adjustable horizontally disposed means forsupporting said mold frame and said concrete pole; means disposed at oneend of said mold frame for extruding said concrete pole from said moldframe a predetermined distance; a plurality of fixed roller supportmeans for facilitating the longitudinal movement of said concrete polewhen said concrete pole is separated from said mold frame; horizontallymovable means disposed at the other end of said mold including means forexternally gripping said extruded pole and extracting said pole fromsaid mold onto said fixed roller support means; and means for verticallyadjusting said vertically adjustable means for vertically aligning saidvertically adjustable means with said roller means whereby saidextracted pole may be placed upon said fixed roller support means. 2.Apparatus for separating a concrete pole from a mold frame including anextracting device comprising: a hydraulic jack having movable ram meansfor engaging and extruding said pole from said mold frame apredetermined distance; a plurality of gripper means disposed about saidjack for gripping a flanged portion of said mold frame; spring meansrespectively associated with each of said gripper means for biasing saidgripper means to an open position whereby said gripper means may bedisposed about said flanged portion of said mold frame; and rotatablecam means disposed about said jack for biasing said gripper means to aclosed position whereupon said gripper means may grip said flangedportion of said mold frame.
 3. Apparatus for separating a concrete polefrom a mold frame including an extracting device comprising: a trolleymovable upon guide rail means; clamping means pivotably secured to saidtrolley for externally gripping a portion of said pole which has beenexposed from said mold frame; motor driven cable means secured to saidtrolley for moving said trolley; and toggle means interconnecting saidclamping means and said trolley whereupon said clamping means are biasedtoward a closed, clamping position when said motor driven cable meansmoves said trolley in a direction so as to extract said pole from saidmold frame.